CHEMISTRY HIGH SCHOOL

Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different isotopes.How many protons Z and how many neutrons N are there in a nucleus of the most common isotope of silicon, 28/14Si?

Answers

Answer 1

Answer:

Answer:

There are 14 protons (Z) and 14 neutrons (N) in a nucleus of the most common isotope of silicton.

Explanation:

The notation of the most common isotope of silicon is:

$^(28)_(14)Si$

The superscript, 28, to the left of the chemical symbol, Si, is the mass number, usually identified with the symbol A, and it is the sum of the protons and neutrons.

The subscript, 14, to the left of the chemical symbolr, Si, is the atomic number, Z, which is the number of protons.

Then, you have this equation:

mass number = number of protons + neutrons, or, in symbols:

A = Z + N

The number of protons is the same for any isotope of the same element. This is, all the isotopic forms of silicon have the same number of prtons: 14

The number of neutrons is determined from the equation A = Z + N, solving for N:

N = A - Z = 28 - 14 = 14.

Hence, the most common isotope of silicon has 14 protons and 14 neutrons.

Related Questions

If you have 100.0 grams of carbon and 100.0 grams or iron, which sample will contain more atoms
Why is water (H2O) considered the "universal solvent"?
Given the boiling point of water which is 81 degrees Celsius, calculate the atmospheric pressure.
Which of the following combinations would result in the largest attractionbetween particles?Large charges close togetherSmall charges close togetherLarge charges far apart from each otherOSmall charges far apart from each other
The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____. about 200 calories of heat must be added to 1 gram of ethanol to change its temperature about 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a liquid about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas

Several steps are involved in the industrial production of sulfuric acid. One step involves the oxidation of sulfur dioxide gas to form sulfur trioxide gas. A catalyst is used to increase the rate of production of sulfur trioxide gas. In a rigid cylinder with a movable piston, this reaction reaches equilibrium, as represented by the equation below.2SO2(g) + O2(g) <==> 2SO3(g) + 392 kJ
Explain, in terms of collision theory, why increasing the pressure of the gases in the cylinder increases the rate of the forward reaction.
Determine the amount of heat released by the production of 1.0 mole of SO3(g).
State, in terms of the concentration of SO3(g) , what occurs when more O2(g) is added to the reaction at equilibrium.

Answers

Increasing the pressure will mean that these particles will collide more frequently to yield the products hence driving the forward reaction.

What is the collision theory?

According to the collsion theory, reaction occurs as a result of collision between reactants in a system. Now we have the reaction; 2SO2(g) + O2(g) <==> 2SO3(g) + 392 kJ.

We can see that there are more particles on the left hand side than on the right hand side. Increasing the pressure will mean that these particles will collide more frequently to yield the products hence driving the forward reaction.

Now;

2 moles of SO3(g) produces 392 kJ of heat

1 mole of SO3(g) produces 1 mole * 392 kJ /2 moles

= 196 kJ

Learn more about collision theory: brainly.com/question/867804

Increasing the pressure of the gas increases the intermolecuar forces of attraction between the molecules because the distance between the molecules are being reduced by the action of the piston.

solution of silver chloride at constant temperature: AgCl(s) ↔ Ag+(aq) + Cl-(aq) As NaCl(s) is dissolved in the solution, the concentration of the Ag+ ions in the solution 1. decreases, and the concentration of Cl- ions increases 2. decreases, and the concentration of Cl- ions remains the same 3. increases, and the concentration of Cl- ions increases 4. increases, and the concentration of Cl- ions remains the same

Answers

If in the silver chloride solution we add NaCl then concentration of silver ions decreases, and the concentration of Chloride ions increases.

What is equilibrium law?

According to this law, when any external stress is applied in the equilibrium state then the reaction will shift on those side where the stress will reduces.

If in the silver chloride solutions then in the solution silver and chloride ions are present, and then when we add sodium chloride to that solution then it also dissociates into sodium and chloride ions. Then as a result of which concentration of chloride ions increases and to maintain the change equilibrium will shift towards the reactant side as a result of which concentration of silver ion decreases.

Hence, concentration of silver ions decreases, and the concentration of Chloride ions increases.

To know more about equilibrium law, visit the below link:
brainly.com/question/2943338

#SPJ2

As a matter of fact, NaCl(s), when dissolves in water, dissociates into ion Na+ and Cl-.

There is water in the silver chloride solution. Therefore, when being added to the solution, NaCl dissociates into Na+ and Cl-, which makes the concentration of Cl- in the solution increase.

According to Le Chatelier's Principle, when [Cl-] increases, the chemical equation seems to shift in a way that could make more AgCl. Therefore, Ag+ has to react with Cl-, which makes [Ag+] decrease.

The correct answer is (1).

Hope this helps~

How many moles of magnesium is 3.01 x 10^22 atoms of magnesium?

Answers

Moles are the base unit of atoms, molecules, ions, or any other substance. It is exactly 6.022 × 10²³ entities of any substance. The mole is equal to the ratio of the given mass to the molar mass.

Given that:

Magnesium atoms = $3.01 * 10^(22 )$

1 mole of a substance = $6.022 * 10^(22 )$

Now, calculating the moles of magnesium in the given entity:

Mole = $3.01 * 10^(22)* \frac{1 \text {mol}}{6.022 * 10 ^(22)}$

Mole = 0.05 moles.

Thus, the moles are defined as the base unit of any substance. It was discovered by the scientist Avogadro and is also known as Avogadro's number ( $6.022 * 10^(22 )$ ).

Therefore, the mole in $3.01 * 10^(22 )$ atoms of Magnesium will be 0.05.

To know more about moles, refer to the following link:

brainly.com/question/20674302

3.01 x 10^22 x 1 mol/avagadro's number = 5e + 44 boy-o. and music does rock.

Why are some elements more reactive than others?

Answers

All other atoms have less stable electron numbers, so they react with each other and share electrons to be more stable. The most reactive elements tend to be short one or two electron or have one or two extra electrons.

because of extra electrons

A metal, M, forms an oxide compound with the general formula M2O. In which group on the Periodic Table could metal M be found?(1) Group 1 (3) Group 16
(2) Group 2 (4) Group 17

Answers

The oxidation state of an element is calculated by subtracting and the total sum of oxidation states of all the individual atom (excluding the one that has to be calculated) from total charge on the molecule. Option (1) is correct option.

What is oxidation state?

Oxidation state of an element is a number that is assigned to an element in a molecule that represents the number of electron gained or lost during the formation of that molecule or compound. Oxidation state is a unitless quantity.

Oxidation state of M in M₂O is:

Let oxidation state of M be X

Oxidation state of Oxygen is -2

Overall charge on the molecule is 0

so 2X+(-2)=0

X=+1

So from here we can see that oxidation state of M is +1 which is possessed only by group 1 element

Hence option (1) is correct option.

To learn more about Oxidation state, here:

brainly.com/question/11313964

#SPJ2

Because the compound has a formula of M2O, the number of valence electrons of M should be 1.

Therefore, (1) Group 1 is the correct answer because elements in group 1 have 1 valence electron.

Hope this helps~

Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe): 2H2O2(aq) ---> 2H2O(l) + O2(g)What volume of pure O2(g), collected at 27C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution?

Answers

Answer:

23.0733 L

Explanation:

The mass of hydrogen peroxide present in 125 g of 50% of hydrogen peroxide solution:

$Mass=\frac {50}{100}* 125\ g$

Mass = 62.5 g

Molar mass of $H_2O_2$ = 34 g/mol

The formula for the calculation of moles is shown below:

$moles = (Mass\ taken)/(Molar\ mass)$

Thus, moles are:

$moles= (62.5\ g)/(34\ g/mol)$

$moles= 1.8382\ mol$

Consider the given reaction as:

$2H_2O_2_((aq))\rightarrow2H_2O_((l))+O_2_((g))$

2 moles of hydrogen peroxide decomposes to give 1 mole of oxygen gas.

Also,

1 mole of hydrogen peroxide decomposes to give 1/2 mole of oxygen gas.

So,

1.8382 moles of hydrogen peroxide decomposes to give $\frac {1}{2}* 1.8382 mole of oxygen gas. Moles of oxygen gas produced = 0.9191 molGiven: Pressure = 746 torrThe conversion of P(torr) to P(atm) is shown below:[tex]P(torr)=\frac {1}{760}* P(atm)$